code: def forward(self, inputs):
      if not self.activation_fn_in_separable_conv:
          x = F.relu(inputs)
          x = self._conv1(x)
          x = F.relu(x)
          x = self._conv2(x)
          x = F.relu(x)
          x = self._conv3(x)
      else:
          x = self._conv1(inputs)
          x = self._conv2(x)
          x = self._conv3(x)
      if self.has_skip is False:
          return x
      if self.skip_conv:
          skip = self._short(inputs)
      else:
          skip = inputs
      return x + skip
  
imports: import paddle.nn
  import paddle.nn.functional
  from paddleseg.cvlibs import manager
  from paddleseg.utils import utils
  from paddleseg.models import layers
label_desc: Use image node_id 2 for calling the Xception_Block obj's underlying member method code with example usage: obj.forward(inputs) and returns: unknown, x